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Related Party Transactions - Additional Information (Detail) - PGT, Inc. - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Related Party Transaction [Line Items]          
Windows purchased from PGT, Inc. $ 4.1 $ 3.1 $ 6.5 $ 5.2  
Accounts payable to related parties $ 1.7   $ 1.7   $ 1.4